Merged r15651 into trunk branch.

Don't use StoreIC_ArrayLength on frozen arrays

BUG=v8:2711,chromium:259548

TBR=rossberg@chromium.org

Review URL: https://chromiumcodereview.appspot.com/19139003

git-svn-id: https://v8.googlecode.com/svn/trunk@15652 ce2b1a6d-e550-0410-aec6-3dcde31c8c00